{
  "domain": "physics-astronomy",
  "topics": [
    "quantum-information",
    "scientific-computing"
  ],
  "type": "algorithm",
  "benchmark": {
    "task": "Estimate classically the operator Loschmidt echo of fixed 49–70-qubit circuits",
    "metric": {
      "name": "Error-bar width on the echo value (dimensionless)",
      "better": "lower"
    }
  },
  "source": {
    "key": "quantum-advantage",
    "name": "Quantum Advantage Tracker",
    "url": "https://github.com/quantum-advantage-tracker/quantum-advantage-tracker.github.io/tree/main/data/observable-estimations/circuit-models/operator_loschmidt_echo",
    "id": "operator_loschmidt_echo",
    "curator": "Quantum Advantage Tracker reviewers (IBM, Flatiron Institute, BlueQubit, Algorithmiq and others)",
    "poser": "Algorithmiq, IBM and Flatiron Institute",
    "status": "active candidate",
    "as_of": "2026-10-20",
    "catalog": "0521c19bbd38"
  },
  "review": true,
  "approval": "first-time"
}